Just one of the domains will be for a project. The other ones will be for sale. So I think your comments are still relevant. I prefer a short domain because it will be easier to remember for the users. The name of the domain will the brand. I now understand that to build my project I should use a .com. I will review my expectations down and consider acquiring a slightly longer domain name. It will be too difficult to acquire a brandable and easily pronounceable LLLL.com for a low $xxx range.